﻿using System.Collections;
using System.Text.Json.Nodes;

namespace CSharpPro._1106;

public class Demo
{
    public void Test()
    {
        ArrayList arrayList = new ArrayList();
        List<User> users = new List<User>();
        Stack<int> stack1 = new Stack<int>();
        Stack<User> stack2 = new Stack<User>();
        Stack<Student> stack3 = new Stack<Student>();
        Child child = new Child();
        Student student = new Student();
        Dictionary<String, object> dictionary = new Dictionary<String, object>();
        dictionary.Add("code", "0");
        // JsonCovert.
    }
}